Emmy and her remarkably patient master are back in this follow-up to Chad Orzel's How to Teach Physics to Your Dog, except that this time the pair eschew the bizarre realm of quantum physics for the much more intuitive universe of Einstein's theory of relativity. Through conversations with Emmy about the relative speeds of dog and cat motion or the logistics of squirrel-chasing, Orzel translates complex ideas—the slowing of time for a moving observer, the shrinking of moving objects, the effects of gravity on light and time, black holes, the Big Bang, and of course E=mc2—into examples simple enough for a dog to understand.

"Emmy may be one smart dog, but her owner also happens to be an uncommonly gifted communicator. Chad Orzel's treatment of special and general relativity is comprehensive, informative, and amazingly accessible, yet it's funny too. This is, by far, the most entertaining discussion of the subject that I've ever had the pleasure of reading."—Steve Nardis